Is it possible to detune every non-percussion instrument in Hookpad, for songs or analyses that do not use the A440 tuning? All the notes would be offsetted by a fixed amount of cents; the octave is still evenly divided into 12 semitones, as this is not just intonation. For tabs containing only note tracks, this is already possible via the mixer settings, but harmony and bass tracks always “snap” to the nearest semitone in A440, so I believe a global option would be more convenient than adjusting each track individually.
It could probably be incorporated as part of the playback transposition setting, since it serves a similar purpose.